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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2QNIJFN7C4NFJP2MNPZLPEGD6WHKEP5E/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "2QNIJFN7C4NFJP2MNPZLPEGD6WHKEP5E",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/2QNIJFN7C4NFJP2MNPZLPEGD6WHKEP5E/",
    "sender": {
        "address": "kf6kyi (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Mark VandeWettering",
    "subject": "[amsat-bb]  Different ways to do mobile ham radio operation...",
    "date": "2009-10-06T15:26:15Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GQHJ7DBEW4QF456SRDC6WSIFXM2GBALN/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "There has been a lot of discussion about using PDAs and the like to do\nsatellite orbit prediction.   Indeed, I've thought about writing my\nown satellite prediction stuff for the iphone, but haven't bothered\nyet, mostly because i find that having another electronic device that\nI am staring at while I am pointing an antenna with one hand and\nplaying with the HT in the other isn't at all helpful.    Here's how I\nwork a pass:\n\n1. Early in the day (hours ahead of time) I run a prediction for the\nsatellite of interest.   Minimally, you need to know the time of the\nAOS and LOS, the maximum altitude of pass, and azimuth at which these\nevents occur.\n2. Make sure you know where north is.   From your home QTH, it\nprobably is easy, but I carry a compass for mobile operation just in\ncase.\n3. You need to know what time it is.   Accuracy to 30 seconds is\nprobably reasonable for hand held operation, where you might not work\ndown to the horizons anyway.\n4. At AOS, aim your antenna near the horizon at the AOS azimuth.\nDon't bother sweeping left and right all that much if you are pretty\nsure of your directions: the sat will come up on target.   For 70cm\ndownlinks, start 10khz high for the LEO sats we currently have up.\n5. Work the pass.   If you know the azimuth and altitude and time for\nthe max elevation, you can with a glance at your watch \"interpolate\"\nthe satellite pass pretty reasonably.  It may help to have a couple of\nother times/locations along the path, but isn't strictly necessary,\nparticularly if you have full duplex, since you'll be able to hear how\nyou are doing in working the pass.\n\nHonestly, having an interactive display wouldn't be all that useful\nduring the pass.   For one thing, I don't have another hand to hold\nit.   Additionally, it's not like the satellite is going to do\nanything unexpected: it will be coming up exactly as expected, and\nsetting exactly as expected.\n\nOne thing I am working at is a script to create Google Calendar events\nthat are automatically synched to my iphone.   That way, I can get the\ndetails of each pass automatically a day in advance.   Just having\nthat static data on my phone (which I am seldom without) suffices for\n95 percent of all my operating needs.\n\nI should thank WB4APR and K7AGE for their satellite operation tips.\nBob points out that satellite orbits are regular, and hence can be\neasily predicted ahead of time, and a simple printout will show you\nwithin a minute or so when the pass will occur...\n\nhttp://www.aprs.org/sset.html\n\nRandy, K7AGE used a printout of the pass taped to his HT in one of his\nvideos, which I did when I started, but later I realized that if I\njust \"rehearsed\" the pass in my head and had a watch, it wasn't\nnecessary.\n\n73, Mark K6HX\n",
    "attachments": []
}